694947313225 has 81 divisors (see below), whose sum is σ = 991673743879. Its totient is φ = 482708010400.

The previous prime is 694947313183. The next prime is 694947313243. The reversal of 694947313225 is 522313749496.

It is a happy number.

The square root of 694947313225 is 833635.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 250181032761 + 444766280464 = 500181^2 + 666908^2 .

It is not a de Polignac number, because 694947313225 - 2¹³ = 694947305033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1054547946 + ... + 1054548604.

Almost surely, 2^694947313225 is an apocalyptic number.

694947313225 is the 833635-th square number.

694947313225 is the 416818-th centered octagonal number.

It is an amenable number.

694947313225 is a deficient number, since it is larger than the sum of its proper divisors (296726430654).

694947313225 is an equidigital number, since it uses as much as digits as its factorization.

694947313225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1396 (or 698 counting only the distinct ones).

The product of its digits is 9797760, while the sum is 55.

The spelling of 694947313225 in words is "six hundred ninety-four billion, nine hundred forty-seven million, three hundred thirteen thousand, two hundred twenty-five".